I'm not positive, but I think it is any "word" that they always use in reference to the same object. So I think your two examples count as words. As long as they are consistent, they count.

I saw a speech therapist with ds at 20 mths and this is what she said as well. So while we thought liam had hardly any vocabulary, turns out he had a good range. He's 28 mths old now and still uses some made up words, like wawa for sit and dadou for throwing... These words have no reference to an actual word, so it's weird and cute at the same time